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Victor Zverovich 2021-05-31 07:37:10 -07:00
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ChangeLog.rst
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@ -86,6 +86,18 @@
(a C++20 feature) which is available in GCC 9.3+.
Thanks `@alexezeder (Alexey Ochapov) <https://github.com/alexezeder>`_.
* Format string compilation now requires ``format`` functions of ``formatter``
specializations for user-defined types to be ``const``:
.. code:: c++
template <> struct fmt::formatter<my_type>: formatter<string_view> {
template <typename FormatContext>
auto format(my_type c, FormatContext& ctx) const { // Note const here.
// ...
}
};
* Added UDL-based named argument support to format string compilation
(`#2243 <https://github.com/fmtlib/fmt/pull/2243>`_,
`#2281 <https://github.com/fmtlib/fmt/pull/2281>`_). For example: